fig5

Figure 5. TEM imaging on carbon nanotube, MOF, and COF materials. (A) Experimental TEM image, simulated image, and corresponding model of a hydrocarbon chain covalently attached to an ortho-carborane end group^[60]. Scale bar, 1 nm. (B) Experimental TEM image, simulated image, and corresponding model of 4-(1-pyrenyl)phenyl (PP) radicals onto the SWNT sidewall (Py-1-SWNT)^[62]. Scale bar, 1 nm. (C) CTF-corrected and denoised (using a Wiener filter) HRTEM image of ZIF-8 along the [111] axis^[63]. (D) Symmetry-imposed and lattice-averaged image with a structural model of ZIF-8 embedded^[63]. (E) CTF-corrected denoised image of UiO-66, showing triangular channels, individual Zr atomic columns, and the BDC linkers. The benzene rings in the BDC linkers are indicated by the arrows. Overlays are simulated projected potential maps and a projected structural model of UiO-66 for comparison^[55]. (F) Low-magnification TEM image of two oriented, attached ZIF-8 crystals^[63]. (G) CTF-corrected HRTEM image of the region within the green square in (F). Yellow circles highlight Zn triplets with obvious distortions^[63]. (H) CTF-corrected and denoised HRTEM image of TPA-COF^[64]. (I) Left: Lattice-averaged, P3-symmetry imposed and CTF-corrected HRTEM image. Right: Simulated projected potential map with a point spread function width of 4 Å, in which the projected structural model in green and unit cell in red are embedded^[64].